1 # SPDX-License-Identifier: GPL-2.0-only OR BSD !! 1 # SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
2 # Copyright 2021, Arm Ltd 2 # Copyright 2021, Arm Ltd
3 %YAML 1.2 3 %YAML 1.2
4 --- 4 ---
5 $id: http://devicetree.org/schemas/arm/arm,tra !! 5 $id: "http://devicetree.org/schemas/arm/arm,trace-buffer-extension.yaml#"
6 $schema: http://devicetree.org/meta-schemas/co !! 6 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
7 7
8 title: ARM Trace Buffer Extensions 8 title: ARM Trace Buffer Extensions
9 9
10 maintainers: 10 maintainers:
11 - Anshuman Khandual <anshuman.khandual@arm.co 11 - Anshuman Khandual <anshuman.khandual@arm.com>
12 12
13 description: | 13 description: |
14 Arm Trace Buffer Extension (TRBE) is a per C 14 Arm Trace Buffer Extension (TRBE) is a per CPU component
15 for storing trace generated on the CPU to me 15 for storing trace generated on the CPU to memory. It is
16 accessed via CPU system registers. The softw 16 accessed via CPU system registers. The software can verify
17 if it is permitted to use the component by c 17 if it is permitted to use the component by checking the
18 TRBIDR register. 18 TRBIDR register.
19 19
20 properties: 20 properties:
21 $nodename: 21 $nodename:
22 const: trbe !! 22 const: "trbe"
23 <<
24 compatible: 23 compatible:
25 items: 24 items:
26 - const: arm,trace-buffer-extension 25 - const: arm,trace-buffer-extension
27 26
28 interrupts: 27 interrupts:
29 description: | 28 description: |
30 Exactly 1 PPI must be listed. For heter 29 Exactly 1 PPI must be listed. For heterogeneous systems where
31 TRBE is only supported on a subset of t 30 TRBE is only supported on a subset of the CPUs, please consult
32 the arm,gic-v3 binding for details on d 31 the arm,gic-v3 binding for details on describing a PPI partition.
33 maxItems: 1 32 maxItems: 1
34 33
35 required: 34 required:
36 - compatible 35 - compatible
37 - interrupts 36 - interrupts
38 37
39 additionalProperties: false 38 additionalProperties: false
40 39
41 examples: 40 examples:
42 41
43 - | 42 - |
44 #include <dt-bindings/interrupt-controller/ 43 #include <dt-bindings/interrupt-controller/arm-gic.h>
45 44
46 trbe { 45 trbe {
47 compatible = "arm,trace-buffer-extension" 46 compatible = "arm,trace-buffer-extension";
48 interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_H 47 interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>;
49 }; 48 };
50 ... 49 ...
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